123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
#include "ks_dht.h"
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#include "ks_dht-int.h"
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KS_DECLARE(ks_status_t) ks_dht_message_create(ks_dht_message_t **message,
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ks_pool_t *pool,
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ks_dht_endpoint_t *endpoint,
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const ks_sockaddr_t *raddr,
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ks_bool_t alloc_data)
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{
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ks_dht_message_t *m;
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ks_status_t ret = KS_STATUS_SUCCESS;
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ks_assert(message);
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ks_assert(pool);
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*message = m = ks_pool_alloc(pool, sizeof(ks_dht_message_t));
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ks_assert(m);
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m->pool = pool;
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m->endpoint = endpoint;
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m->raddr = *raddr;
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if (alloc_data) {
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m->data = ben_dict();
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ks_assert(m->data);
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}
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// done:
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if (ret != KS_STATUS_SUCCESS) {
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ks_dht_message_destroy(message);
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}
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return ret;
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}
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KS_DECLARE(void) ks_dht_message_destroy(ks_dht_message_t **message)
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{
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ks_dht_message_t *m;
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ks_assert(message);
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ks_assert(*message);
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m = *message;
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if (m->data) {
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ben_free(m->data);
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m->data = NULL;
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}
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ks_pool_free(m->pool, message);
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}
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KS_DECLARE(ks_status_t) ks_dht_message_parse(ks_dht_message_t *message, const uint8_t *buffer, ks_size_t buffer_length)
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{
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struct bencode *t;
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struct bencode *y;
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const char *tv;
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const char *yv;
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ks_size_t tv_len;
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ks_size_t yv_len;
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ks_assert(message);
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ks_assert(message->pool);
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ks_assert(buffer);
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ks_assert(!message->data);
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message->data = ben_decode((const void *)buffer, buffer_length);
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if (!message->data) {
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ks_log(KS_LOG_DEBUG, "Message cannot be decoded\n");
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return KS_STATUS_FAIL;
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}
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ks_log(KS_LOG_DEBUG, "Message decoded\n");
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ks_log(KS_LOG_DEBUG, "%s\n", ben_print(message->data));
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t = ben_dict_get_by_str(message->data, "t");
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if (!t) {
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ks_log(KS_LOG_DEBUG, "Message missing required key 't'\n");
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return KS_STATUS_FAIL;
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}
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tv = ben_str_val(t);
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tv_len = ben_str_len(t);
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if (tv_len > KS_DHT_MESSAGE_TRANSACTIONID_MAX_SIZE) {
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ks_log(KS_LOG_DEBUG, "Message 't' value has an unexpectedly large size of %d\n", tv_len);
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return KS_STATUS_FAIL;
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}
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memcpy(message->transactionid, tv, tv_len);
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message->transactionid_length = tv_len;
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// @todo hex output of transactionid
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//ks_log(KS_LOG_DEBUG, "Message transaction id is %d\n", message->transactionid);
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y = ben_dict_get_by_str(message->data, "y");
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if (!y) {
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ks_log(KS_LOG_DEBUG, "Message missing required key 'y'\n");
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return KS_STATUS_FAIL;
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}
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yv = ben_str_val(y);
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yv_len = ben_str_len(y);
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if (yv_len >= KS_DHT_MESSAGE_TYPE_MAX_SIZE) {
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ks_log(KS_LOG_DEBUG, "Message 'y' value has an unexpectedly large size of %d\n", yv_len);
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return KS_STATUS_FAIL;
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}
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memcpy(message->type, yv, yv_len);
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message->type[yv_len] = '\0';
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//ks_log(KS_LOG_DEBUG, "Message type is '%s'\n", message->type);
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return KS_STATUS_SUCCESS;
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}
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/* For Emacs:
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* Local Variables:
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* mode:c
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* indent-tabs-mode:t
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* tab-width:4
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* c-basic-offset:4
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* End:
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* For VIM:
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* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
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*/
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